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Type: Artigo de periódico
Title: Thermodynamic Analysis Of A Cogeneration System With Black Liquor Gasification: Influence Of Gas Composition [análise Termodinâmica De Um Sistema De Co-geração Com Gaseificação De Licor Negro: Influência Da Composição Do Gás]
Author: Dos Santos P.R.
D'Angelo J.V.H.
Abstract: In the last years, expansions in the production capacity of pulp and paper industries have caused a large increase in the amount of black liquor available for burning, generating a bottlenecking effect in the recovery unit. Frequent problems in the recovery boiler such as corrosion, fouling and explosions risks due to high processing rates have become a preoccupying reality. The lifetime of recovery boilers is another important factor, because a large number of them are close to their end. In this work an energy cogeneration system with black liquor gasification was studied, in order to help in the evaluation of the technical viability of this alternative process using the Second Law of Thermodynamics. To reach this goal, a simulation of this cogeneration system was performed in a commercial simulator (HYSYS© 2.2), and the influence of the gas composition from the gasifier on destroyed exergy rate in the cogeneration system was analyzed. The results have shown that the composition of the gas produced in the gasifier has a great influence on the destroyed exergy rate in the process and that water, hydrogen and carbon monoxide are the main components related to this destruction. This was verified through an exergetic analysis, which has shown that the greatest losses occur in the combustion chamber of the gases. Black liquor gasification process is becoming a real alternative process and any study that contributes to evaluate its viability is important. This work intends to supply some parameters, like operational conditions of the gasifier and destroyed exergy rate in the components of the cycle, which may be used for further investigations on black liquor gasification processes.
Rights: fechado
Identifier DOI: 
Date Issue: 2008
Appears in Collections:Unicamp - Artigos e Outros Documentos

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